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#include <bits/stdc++.h>

using namespace std;

int main() {
    cin.tie(0)->sync_with_stdio(0);

    int n;
    cin >> n;
    vector<int> res;
    for(int i = 1; i <= n; i++) {
        int x;
        string s;
        cin >> s >> x;
        if(res.size() >= 20) continue;
        if(s == "NIE") continue;

        if(res.size() < 10) res.push_back(i);
        else if(x < 2) res.push_back(i);
    }

    for(auto r : res) cout << r << ' ';
    cout << '\n';
}